TAILIEUCHUNG - Ebook Diagnostic methods in the cardiac catheterization laboratory: Part 2

(BQ) Part 2 book "Diagnostic methods in the cardiac catheterization laboratory" presents the following contents: Clinical applications of OCT, viability assessment and cardiac function, cardiovascular interventional MR imaging, coronary stenosis evaluation with CT angiography, invasive evaluation of renal artery stenosis,. | 15 Merits and limitations of FFR for the evaluation of ambiguous lesions Special attention to ostial location bifurcation tandem lesion ectasic vessel in-stent restenosis and diffuse disease Clarissa Cola and Manel Sabate INTRODUCTION Coronary angiography remains the gold standard for the diagnosis of epicardial coronary artery disease. However precise quantification of lesions severity is limited because of the complex three-dimensional geometry of epicardial plaques. Moreover coronary physiology and physiopathological effects of lesions cannot be Accurate identification of both normal and diseased vessel segments is complicated by diffuse disease as well as by angiographic artefacts of contrast streaming image foreshortening and calcification. Bifurcation or ostial lesion locations may be obscured and difficult to assess by overlapping branch segments. Measurements of coronary pressure and flow provide complementary information to the anatomic characterization of coronary disease obtained by both angiographic and intravascular ultrasound examinations. In particular fractional flow reserve FFR has been demonstrated to be a useful tool to easily and reliably assess lesions significance and FFR in the catheterization laboratory can facilitate timely and more objective decision making about therapy especially in complex and difficult settings. Table summarizes current recommendations for the application of physiologic measurements with FFR and shows how its use in more complex settings is still under In this chapter we describe the utility and limitations of this technique in particular complex situations such as ostial location bifurcation tandem lesions ectasic vessel and in-stent restenosis Table . LEFT MAIN AND AORTO-OSTIAL LESIONS Ostial lesions assessment and their real significance is often a problem for the interventionalist because of the technical limitations of angiography in this setting. This .

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